Make mp3s louder

<p>I have my iPod loaded with music and generally listen to it through my car stereo. Inevitably, there are very loud songs; I have to turn the stereo down to 4 or 5. There are also very quiet songs; I have to turn the stereo to 20 or 25 to hear them properly.</p> <p>Is there a way to increase the loudness (if that is the correct term) of the quiet mp3s so that I don't have to turn the stereo up to such a large volume?</p> <p>Ideally it will be a non-destructive change and reversible if the results sound horrible. It should allow me to specify an mp3 with the target loudness and make the other mp3s as loud.</p> <p>The mp3s are mixed and generally not from the same artist or album. It would also be nice to get a report of the changes before they are made so I can listen for my self to see what would happen.</p> <p>Thanks, Troy</p>